I'm looking for some advice on how to manage a passiflora cutting. The two pics attached show the cutting in the early stages as it began to root and grow leaves and the second is where we are at 5 months on.
On average it is growing about 8cm a month which I'm really pleased about but all the growth is currently coming on one long trailing branch off the main stem which as you can see by the first picture is very thin and potentially weak.
Over time will the stem thicken up?
Come the end of summer I've been told to cut the growing branch back to no more than a foot in length. is this wise? Will it not just shock the plant and kill it?
How do I get it to sprout branches in other places so that it isn't just one long trailing arm?
My aim is to be able to plant this in the garden a year from now once it has toughened up and looks like it could withstand life out doors.
Any advice that anyone can offer would be greatly received as I know next to nothing about how to care for developing cuttings like these and especially pasiflora.